Size-type inconsistency (signedness) causes confusion and even bugs.
For example when signed compared to unsigned the result might not
be expected. Summary of this commit:
Related APIs changes:
1. getDynamicExtent() returns signed version of extent;
2. Add getDynamicElementCountWithOffset() for offset version of element count;
3. getElementExtent() could be 0, add defensive checking for
getDynamicElementCount(), if element is of zero-length, try
ConstantArrayType::getSize() as element count;
Related checker changes:
1. ArrayBoundCheckerV2: add testcase for signed <-> unsigned comparison from
type-inconsistency results by getDynamicExtent()
2. ExprInspection: use more general API to report more results
Fixes https://github.com/llvm/llvm-project/issues/64920
Reviewed By: donat.nagy, steakhal
Differential Revision: https://reviews.llvm.org/D158499
We now skip the destruction of array elements for `delete[] p`,
if the value of `p` is UnknownVal and does not have corresponding region.
This eliminate the crash in `getDynamicElementCount` on that
region and matches the behavior for deleting the array of
non-constant range.
Reviewed By: isuckatcs
Differential Revision: https://reviews.llvm.org/D136671
